Output quantization

[crobi]

Implement a simple customizable geometry quantization. The model format should be fast to load, so don't bother with complex schemes like a predictive encoding with variable bit rates.

• Collect global ranges of values for vertex positions, node positions, and node scaling vectors
• Implement int16 and int8 encoding of floats (use above ranges for encoding/decoding)
• Add options to select encoding for binary data
  • Separate options for vertex positions, vertex normals, texture coordinates, node positions, node quaternions, node scale, transform matrix?
  • Or just one option for positions, one for texture coordinates, one for normals/quaternions?
• Add options to select the number of digits for JSON/text data
• Add convenience functions to write JSON numbers, something like:

enum Semantic{
  VertexPosition,
  VertexNormal,
  TextureCoordinate,
  NodePosition,
  NodeQuaternion,
  NodeScale,
  TransformationMatrix
};
function roundNumber(value: number, semantic: Semantic, options: Options): number;